We now state Algorithm REF . \(\phi \)  and \(\gamma \)  are constants (dependent on \(\rho \) ) used in the analysis that are defined as in [1]}. Each point has a flag that is either raised or lowered (given by the \(Flag\)  function). All points have their flag initially lowered, given on Line 1. A lowered flag shows that the point is being read for the first time (being received from the stream), and a raised flag shows that the point is being re-read by the algorithm (having been stored in memory).
